Pirelli PIR Scorpion Weatheractive 255/55R20

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What 255/55R20 means

In the size 255/55R20, 255 is the section width in millimeters (10.04 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 140.2 mm (5.52 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 31.04 inches, turning roughly 650 revolutions per mile. Overall diameter is what matters for speedometer accuracy and clearance when you change sizes, so compare it — not just the width — against your current tire.

The manufacturer lists the overall diameter of this specific tire as 20 inches — when clearance is tight, go by the published figure rather than the nominal size math.

The service description on this tire decodes to a load index of 110 — a maximum load of 2,337 lbs per tire. The speed symbol V corresponds to a maximum sustained speed of 149 mph.

Specifications

Frequently asked questions

What are the treadwear and warranty ratings on the Pirelli Scorpion Weatheractive?

This tire carries a treadwear grade of 700, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 60K.

What does 110V mean on the Pirelli Scorpion Weatheractive?

110V breaks down as load index 110 — rated for 2,337 lbs per tire — with a V speed rating, good for a maximum sustained 149 mph.

What kind of tire is the Pirelli Scorpion Weatheractive?

The Pirelli Scorpion Weatheractive in 255/55R20 is a high-performance tire.

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